Bevel



(No Model.)

E. D. FARNHAM.

BEVEL.

No. 339,633. Patented Apr. 13, 1886.

Jay. 3:

N. PETERS. Pmw-Liuw hur, Washinglun I) C.

NlTED S'rrrrns ATlEN'l C ement ELBRIDGE D. FARNHABI, OF MILTON MILLS,NFA'V HAMPSHIRE.

BEVEL.

SPECIFICATION forming part of Letters Patent No. 339,633, dated April13, 1886.

Application tile(lDocenihcr2Sl,18S5. Serial No. 187,042. (No model.)

To all whom it may concern.-

Be it known that I, ELBRIDG-E D. EARN- HAM, a citizen of the UnitedStates, residing at Milton Mills, in the county of Strafford and Stateof New Hampshire, have invented certain new and useful Improvements inSquares;

and I do declare the following to be a full,

clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and usethesame, n-ference being had to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis specification.

This invention relates to try-squares of that class in which the bladeportion is made ad justable relative to the handle or stock; and itconsists in the novel features shown and more fully hereinafter setforth and specifically claimed.

In the drawings, Figure 1 is an elevation of my improved square, thedotted lines showing some of its various adjustments. Fig. 2 is a Viewlooking in the direction of the ar row, Fig. 1. Fig. 3 is a view of theblade at tached. Fig. 4 isa detail section through the end of the stockand blade, showing the clampscrew for holding the blade in an adjustedposition.

The handle or stock is made in two corresponding parts, A A, each ofwhich consists of a metal frame, B, veneered by a wooden piece. (3. Theends of the faces designed to lie adjacent to each other are slightlyprojeeted to form a space, D, when the parts are together. The rear endsare secured by rivets a. The blade E is held between the front ends ofthe stock by a setscrew, F, passed loosely through one part of the bladeand screwed into the other part. The forward ends are rounded orsemicircular and reduced in thickness for an equal distance from therounded edge, as indicated at 12, leaving a raised por tion around theopening through which the set-screw passes. This reduced portion isbeveled outward, and has a series of notches, (2, formed therein. Thenotches in each end correspond and coincide with each other.

The blade E has an opening, e, near its outer edge, so disposed that aline drawn at right angles from either parallel edge will pass throughthe center of said opening 6 and the center of the pivot-opening f.Opening 6 is preferably oblong, and its lower half, or that part nearestthe pivot-opening, corresponds with the notches d in the ends of thestock.

The notches are graduated and indicate any desired angle; or the squaremay be used as a straight-edge, which positions are clearly indicated indotted lines, Fig. 1.

By having the notches d in each end of the parts of the stock correspondand coincide, and the opening 6 in the blade likewise partiallycorrespond with the notches, greater precision and nicety of adjustmentmay be had. For instance, if it is desired to set the blade at a certainangle to the stock, the set-screw is slackened, when the blade may beturned till the opening 6 comes opposite the notch indicating thedesired angle, and, in order that a true alignment of the notches andopening may be had, irrespective of sighting, atapering key may beinserted through such opening 6, when it will be made to coincide withthe notches. Then by tightening the set'screw the device is ready foruse, the parts being prevented from slipping by the key, which may beleft in place till the blade is securely clamped.

Having thus described my invention, what I claim. and desire to secureby Letters Patent,

1. The combination, with the stock having semicircular ends notchedaround their edge, of a blade pivotally secured between said ends andprovided with an opening to register with the notches, whereby atruealignment may be obtained by the insertion of a tapering instrunientthrough the opening and notches, substantially as hereinbeforespecified.

2. A try-square composed of the following elements, in combination: a'stock made in two parts secured together, leaving a space between them,each part terminating in semicircular reduced ends having correspondingradial notches, a blade adjustably clamped between the ends by aset-screw, and having an oblong opening at one side of the pivotopeningon a line drawn at right angles from one side through the pivot-opening,one-half of said opening corresponding with the notches in thesemicircular ends, substantially as and for the purposes set forth.

In testimony whereof I affiX my signature in presence of two witnesses.

\Vitnesses: ELBRIDGE l). lllth'lhlll.

JOSHUA M. Yoozvo, ALFRED R. WoRMWooD.

